A question about structures

I'm in the process of teaching myself C++ (with the help of several good 
books) so I can develop some DLL's for another application.

Looking through an example of one of these, there's a line that defines 
a structure as follows:

struct ParameterDefinition primaryParams[]=
{
	{"x position =", kXpos, 1.0}
	{"y position =", kYpos, 2.0}
	{"z position =", kZpos, 0.0}
};


None of the books I've been reviewing define a structure in this way (at 
least so far).   So what is "ParameterDefinition"?  A pointer?  I assume 
it actually contains the code that defines this  structure type.  Is 
there a name for this way defining a structure?  I'd like to read more 
about that.


Thanks.